Ranked by reported Q1 2026 13F market value
Share of total reported institutional value in MGX held by the largest 10 / 25 filers.
| # | Institution | Shares Held | Market Value | QoQ Change | Ownership % | % of Fund |
|---|---|---|---|---|---|---|
| 1 | VANGUARD CAPITAL MANAGEMENT LLC | 1.1M | $1.4M | β | 2.810% | 0.00% |
| 2 | RENAISSANCE TECHNOLOGIES LLC | 788K | $1.1M | +25.4% | 2.093% | 0.00% |
| 3 | Catalio Capital Management, LP | 529K | $709K | 0.0% | 1.405% | 0.15% |
| 4 | Peapod Lane Capital LLC | 517K | $683K | +3.8% | 1.373% | 0.56% |
| 5 | TWO SIGMA INVESTMENTS, LP | 497K | $666K | +12.6% | 1.320% | 0.00% |
| 6 | BRIDGEWAY CAPITAL MANAGEMENT, LLC | 396K | $530K | 0.0% | 1.051% | 0.01% |
| 7 | JACOBS LEVY EQUITY MANAGEMENT, INC | 382K | $512K | β | 1.015% | 0.00% |
| 8 | GEODE CAPITAL MANAGEMENT, LLC | 358K | $480K | +17.1% | 0.951% | 0.00% |
| 9 | PURA VIDA INVESTMENTS, LLC | 264K | $354K | 0.0% | 0.702% | 2.38% |
| 10 | BlackRock, Inc. | 230K | $308K | +2.7% | 0.611% | 0.00% |
| 11 | WELLS FARGO & COMPANY/MN | 202K | $271K | +70.7% | 0.537% | 0.00% |
| 12 | VANGUARD FIDUCIARY TRUST CO | 170K | $228K | β | 0.452% | 0.00% |
| 13 | MILLENNIUM MANAGEMENT LLC | 170K | $228K | -27.7% | 0.452% | 0.00% |
| 14 | JANE STREET GROUP, LLC | 151K | $203K | -65.1% | 0.402% | 0.00% |
| 15 | STATE STREET CORP | 120K | $161K | 0.0% | 0.320% | 0.00% |
| 16 | Resolute Advisors LLC | 90K | $121K | 0.0% | 0.239% | 0.05% |
| 17 | Man Group plc | 79K | $105K | +39.2% | 0.209% | 0.00% |
| 18 | NORTHERN TRUST CORP | 75K | $101K | 0.0% | 0.200% | 0.00% |
| 19 | RBF Capital, LLC | 64K | $86K | 0.0% | 0.170% | 0.00% |
| 20 | BBR PARTNERS, LLC | 53K | $72K | 0.0% | 0.142% | 0.00% |
| 21 | XTX Topco Ltd | 41K | $54K | -41.2% | 0.108% | 0.00% |
| 22 | Marex Group plc | 15K | $54K | β | 0.040% | 0.00% |
| 23 | Fortitude Advisory Group L.L.C. | 37K | $50K | -4.0% | 0.099% | 0.02% |
| 24 | MORGAN STANLEY | 28K | $37K | -53.8% | 0.073% | 0.00% |
| 25 | MARSHALL WACE, LLP | 28K | $37K | -65.2% | 0.073% | 0.00% |
denotes a marquee investor (Buffett, Burry, ARK, Tiger Global, Pershing Square, Baupost and other widely-followed managers). β% of Fundβ shows how much of that investorβs total 13F portfolio is invested in MGX β a direct measure of their conviction.
Filings activity in MGX during Q1 2026, grouped by how each filer changed its position.
Institutions that opened a new MGX position in Q1 2026
Institutions that fully closed their MGX position in Q1 2026
8 quarters of 13F filings Β· Ξ columns show change vs prior quarter
| Quarter | Inst. Holders | Ξ Holders | Ownership % | Ξ Ownership | Total 13F Value | Ξ Value |
|---|---|---|---|---|---|---|
| Q1 2026 | 48 | 14% | 19.24% | 4.74 pp | $9M | 20% |
| Q4 2025 | 56 | 3.4% | 23.98% | 7.32 pp | $11M | 23% |
| Q3 2025 | 58 | 17% | 31.30% | +8.64 pp | $14M | +38% |
| Q2 2025 | 70 | 10% | 22.66% | 6.23 pp | $10M | 22% |
| Q1 2025 | 78 | +1.3% | 28.89% | 55.24 pp | $13M | 66% |
| Q4 2024 | 77 | +17% | 84.13% | +34.18 pp | $38M | +68% |
| Q3 2024 | 66 | +22% | 49.95% | 52.47 pp | $23M | 51% |
| Q2 2024 | 54 | β | 102.42% | β | $46M | β |
Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Ξ columns compare to the immediately prior filed quarter.
Quick answers to the most common questions about buying MGX stock.
Based on Q1 2026 13F filings, institutional ownership of Metagenomi, Inc. Common Stock stands at 19.2%, held across 48 reporting institutions.
VANGUARD CAPITAL MANAGEMENT LLC is the largest reported institutional holder of MGX, with approximately 1,057,944 shares worth $0.00B as of Q1 2026.
Yes β 4 widely-followed marquee investors appear among the top 25 institutional holders of MGX, including RENAISSANCE TECHNOLOGIES LLC, TWO SIGMA INVESTMENTS, LP, MILLENNIUM MANAGEMENT LLC, JANE STREET GROUP, LLC.
Our composite Smart Money Score for MGX is 41 out of 100 (Neutral). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
6 institutions opened new positions in MGX during Q1 2026, while 14 fully exited. 4 added to existing positions and 36 trimmed.
MGX institutional ownership fell by 4.74 percentage points quarter-over-quarter, with a net change of -8 holders.
The top 10 institutions account for 77.3% of all reported 13F value in MGX, and the top 25 account for 98.1%.
All data is sourced from SEC Form 13F filings, which institutional investment managers with at least $100M in assets are required to file each quarter. We process every 13F filing from EDGAR and recompute the aggregates after each cycle. Insider transactions are sourced from Form 4 filings.
Metagenomi, Inc. Common Stock (MGX) Institutional Ownership